Garten



T.- L. BAUMGARTEN.

SLIP SHAFT COUPLING.

No. 517,787. 7 Patented Apr. 3, 1894.

FEZE K a K ZQI STATE PATENT I ()EEicE.

THEODORE L. BAUMGARTEN, OE HORNELLSVILLE, NEW YORK, ASSIGNOR OF ONE-HALF TO FARRAND o. PRINDLE, OF SAME PLACE.

SLIP-SHAFT COUPLING:

SPECIFICATION-forming part of Letters Patent No. 517,787, dated April 3, 1894. Application filed March 18 1893- SerialNo. 466,705. (No model.)

To. all whom it may concern.-

Be it known that I, THEODORE L. BAUM- GARTEN, a citizen of the United States, residing at Hornellsville, in the county of Steuben and State of New York, have invented a new and useful Slip-Shaft Coupling, of which the following is a specification.

This invention relates to slip shaft. couplings; and it has for its object to provide an improved shaft coupling that is designed to Y firmly couple adjacent shaft ends together,

while at the same time providing a coupling especially adapted for coupling the shaft of grinding and crushing machinery to a round drive shaft, so that when hard foreign substances work their way into the machinery, the same will not be injured owing to the construction of the coupling which allows the drive shaft to slip therein, thereby stopping the machinery being driven.

With these and many other objects in view which will readily appear as the nature of the invention is better understood, the same, consists in the novel construction, combination,

and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the accompanying drawingsz-Figure 1 is a perspective view of a shaft coupling constructed in, accordance with this inventlon,

Fig. 2 is an end view thereof. Fig. 3 isacen-" tral vertical longitudinal sectional view on the line X-X of Fig. 2. Fig. 4 is a longitudi: nal sectional view on the line Y-Y of Fig. 2.

Referring to the accompanying drawings, A represents a cylindrical coupling block or casting having a square bore B, at one end adapted to fit over the squared end 0, of a mill or other machinery shaft, while the other end of the block is provided with a circular bore D, into which is designed to fit pne end of the circular ungrooved drive shaft E, exteriorly and slightly flattened at one side as at F, for the purpose hereinafter described. The circularly bored end of the coupling block or casting A, is exteriorly tapered as at G, and is provided in suchend with the slits H, andthe key seat or groove I, formed in the bore between said slits, and adapted to receive the elongated flat key J, which is of a width equaling the depth of the groove and ordinarily bears'flat against or in contact said screws engage the integral threaded lugs O, projecting laterally from opposite sides of the coupling block or castingA. Having fitted the two ends of the shafts-O and E, into the coupling block A, as described, it is only necessary to manipulate the coupling screws N,

so as tocompress the split end of the coupling block onto the shaft and wedge it in position sufficiently tight against one side of the key J, so as toprevent it from turning in ordinary work. When hard foreign substances interfere with themachinery driven by the shaft G, the coupling necessarily stops short with a jerk, which jerk. is sufficient to allow the exteriorly flattened side of the drive shaft E, to slip pastthe flat key J, and therefore allows such shaft to turn or slip in the coupling, thereby relieving the machinery being driven, from all strain'and danger of breaking. The slit end of the coupling block and the coupling ring yield sufficiently in order to allow the drive shaft to turn in the .couplingwithout breaking the same. The

coupling ring or collar necessarily stretchesslightly after each time the drive shaft has forced itself around in the block, and this stretch is compensated for by the taper of the block A, on which the ring is fitted each time. From'the foregoing it is thought that the construction, operation and many advantages of the herein-described slip shaft coupling will be apparent without further description. Having'thus described my invention, what I claim, and desire to secure byLetters Patent, is-- 1. In a slip shaft coupling, the combination of a cylindrical coupling block provided at 100 one end with a circular bore and a squared key-seat or groove formed in one side of said bore, a flat key of a width equaling thedepth of said key seat or groove and fitting therein, the round shaft-end fitted in said circular bore and having an exteriorly-flattened ungrooved side bearing flat against the inner flat face of the key, and means for compressing the bored end of the coupling block, substantially as specified.

2. In a slip shaft coupling, a coupling block having a square here at one end, off-standing threaded lugs, and'an opposite exteriorly tapered end provided with a cylindrical bore, and having slits formed therein and a key seat or groove, a square key adapted to be inserted in said key seat or groove and to lit THEODORE L. BAUMGARTEN.

Witnesses:-

A. '1. PRINDLE, L. C. BAUMGARTEN. 

